ES2228734T3 - COMMUNICATIONS DEVICE BY SPECTRUM SCALING AND COMMUNICATIONS PROCEDURE BY SPECTRUM SCALE. - Google Patents

Abstract

A spectrum staging communications procedure applied to a code division multiple access system that transmits uncompressed frames and compressed frames, in which the compressed frame has a transmission gap characterized by selecting one of a first step size of transmission power control for a normal mode and a second step size of transmission power control for a compressed mode, the second size of control step of transmission power being greater than the first size of control step of the transmission power; for adjusting the transmission power with the size of the control stage of the selected transmission power based on the control information of the transmission power received from a communication collateral; and the transmission of uncompressed frames and compressed frames according to the adjusted transmission power.

Description

Stepping communications device of the spectrum and step communications procedure of the spectrum

Technical field

This invention relates to a device of communication applied to an access communications system multiple by code division (CDMA) and to a procedure of same. More particularly this invention relates to a spectrum staging communications device for improve interleaved transmission and power control of the transmission in spectrum staging communication, and to make transfers between the different frequencies and a procedure of the same.

Prior art

In a CDMA cellular system, how it is used carrier frequency repeatedly in each cell, no need of transfers between frequencies within the same system. Without However, considered a case such as in which existing systems are present together, there is a need for transfers between different carrier frequencies. Three are described below. points that belong to the detailed cases.

As a first point, in a cell where there is considerable traffic, a separate carrier frequency is used to accommodate the increased number of subscribers, and you can perform a handover between those cells. As a second point, when using a constitution of cells in umbrellas, the different are assigned frequencies to large and small cells, and the transfers between cells. As a third point, there are cases of transfers between a third generation system, such as a W-CDMA (broadband) system and a system of second generation such as the mobile phone system current.

When making the transfers as in the cases mentioned above, it is necessary to detect the powers of carrier at different frequencies. To get this detection, the receiver only needs to have a capable structure of detecting two frequencies. However, this increases the size of the constitution of the recipient, or makes the constitution complicated.

In addition, two types of handover procedure: a mobile-assisted handover (MAHO) and a transfer assisted by the network (NAHO). Comparing the MAHO and NAHO procedures, NAHO reduces device load mobile, but to be successful, it should be necessary to synchronize the mobile device and the base station, with which the constitution of the base station and the network get complicated and it gets bigger in order to keep track of each device individual mobile.

For these reasons, the realization of MAHO procedure is more desirable, but to determine whether to do or not a transfer, it is necessary to measure the intensity of the different carrier frequencies on mobile devices. However, a Cellular CDMA system differs from a multiple access system by time division (TDMA) used in a second generation, in which ordinarily uses continuous transmission for both Transmission as for reception. In this transmission technique / continuous reception, unless the recipients that correspond to two frequencies are prepared, it is necessary to stop the timing of transmission or reception and measure the other frequency.

A technique that relates to a compressed mode procedure, for the temporary compression of the transmission data in the usual way and its transmission in a while short, therefore creating some reserve time that can be used to measure the other frequency carrier. As a example of this, there is a National Publication of Request for Japan patent (exposed to public inspection) (JP-UN) No. 8-500475 "Transmission does not continue for transfers without system connections DS-CDMA. "This application describes a procedure to perform a compressed mode, in which the factor stepping of the stepping code used is lowered to Compress the duration of the transmission.

The procedure to perform the compressed mode according to the previous application explained below. Figure 36 shows an example of transmissions in a normal mode and a mode compressed in a conventional CDMA system. In figure 36, the axis vertical represents the transmission speed / power of transmission, and the horizontal axis represents time. In the example of Figure 36, the compressed mode transmission is inserted between normal transmission frames.

In transmission in compressed mode, it facilitates a non-transmission timing in the link frame descending, and can be set in a desired period of time (duration). This non-transmission timing represents the unoccupied period during which the intensity of the other is measured carrier frequency In this way, you can get the slotted transmission inserting the unoccupied period during frame transmission of compressed mode.

In this type of compressed mode transmission, the transmission power is increased according to the ratio of time between the unoccupied period and the timing of frame transmission (compressed mode frame), and therefore, as shown in figure 36, the compressed mode frame is transmits at a higher transmission power than the plot of the normal transmission As a consequence, the transmission quality can be maintained even in frame transmission in mode compressed.

In addition to the application mentioned above, As an example of relevant literature is Gustafsson, M. and collaborators: "Compressed mode techniques for measurements between frequencies in a DS-CDMA band system wide ", Proc. of 8th IEEE PIMRC 1997. This research paper describes the techniques to perform compressed mode in cases other than those when the step factor is lowered, namely when the encoding speed is increased, when uses multi-code transmission and when using a modulation system multibit transmission such as 16QAM.

However, in conventional examples such as in the aforementioned application, such as transmissions are interspersed in units of a frame and within a frame, the interleaving time for slotted transmission (in compressed mode) is more compressed than in transmission normal. Consequently, the interleaving size is shortened which entails a problem of poor decoding on the side of reception. WO96233369 describes a CDMA transfer in the that the power of the compressed signal is constantly maintained higher than that of the uncompressed signal.

In addition, in conventional examples such as in those of the bibliography mentioned above, as shortened Interleaving time length when using mode transmission compressed, the deterioration of the signal quality is increased with regarding fading, and as a command bit is not sent TPC (transmission power control) during non-transmission, it is not possible to get a high speed TPC leaving a problem Poor signal quality later.

In addition, in conventional examples such as the application and literature mentioned above, the factor staggering is lowered when carrying out a transmission of compressed mode However, in general, the factor decrease staggering indicates that a code of staggering that has a short code length. But nevertheless, as the number of stagger codes that can be used is directly proportional to the square of the code length, there are a problem that there are extremely few stagger codes that have short code lengths, and these resources are consumed of staggering code that are vital to perform the Compressed mode transmission.

It is an object of the present invention to resolve the problems described above providing a device of spectrum staging communications and a procedure communication by staggering the spectrum capable of avoiding deterioration of the signal quality caused by the compressed mode, with respect to interleaving, to the control of the power of transmission, code assignment procedures staggering and the like to minimize the effects of errors of transmission.

Description of the invention

A communications procedure is applied by spectrum staggering in a multiple access system by code division that transmits uncompressed frames and frames compressed, in which the compressed weft has a gap of transmission, comprising:

the selection of a first step size of transmission power control for a normal mode and a second step size of transmission power control for a compressed mode, the second step size being transmission power control greater than the first size of transmission power control step;

the transmission power setting with the Step size of transmission power control selected based on the power control information of transmission received from a communication partner;

and transmission of uncompressed frames and of Compressed frames according to the transmission power adjusted

The procedure, comprising further:

receiving control information from the transmission power indicating an increase or decrease in the power.

A communications device is applied by spectrum staggering in a multiple access system by division of code that transmits an uncompressed frame and a frame compressed, in which the compressed weft has a gap of transmission, comprising:

a receiver to receive information from transmission power control indicating an increase or a decrease in power from a partner device of communication;

a controller to select one of a first size of the transmission power control step for a manual mode and a second step size of power control of transmission for a compressed mode, being the second size of the Transmission power control step greater than the first size of the transmission power control step and for adjust the step size of power control transmission based on said power control information of transmission; Y

a transmitter to transmit frames not compressed and compressed frames with transmission power adjusted, the adjusted transmission power shifting between the uncompressed frames and compressed frames.

Power control step sizes They also include step sizes of 1 dB and 3 dB.

The staggering communications device of the spectrum further comprises a memory unit for storing the power control step sizes for each of a normal mode and in a compressed mode.

A multiple access system by division of code transmits an uncompressed frame and a compressed frame, in which the compressed frame has a transmission gap, comprising:

a mobile station that transmits the information of transmission power control indicating an increase or a decrease in potency; Y

a base station comprising

a receiver to receive information from control of the transmitted power transmitted from said mobile station, further comprising a controller for select one of a first size of the control step of the transmit power for a manual mode and a second size of the Transmission power control step for one mode compressed, being the second size of the control step of the transmission power greater than the first step size of transmission power control and to adjust the size of the transmission power control step based on said transmission power control information; Y

a transmitter to transmit the frame no compressed in the frame compressed with the transmission power adjusted, the adjusted transmission power being changed between the uncompressed frame and the compressed frame.

Brief description of the drawings

Figure 1 is a block diagram showing a CDMA system according to a first example;

Figure 2 is a diagram explaining the memory distribution of an interleaver according to the first example;

Figure 3 is a diagram explaining the frame transmission of a downlink according to the first example; Figure 4 is a flow chart explaining a transmission operation in a normal mode according to the first example; Figure 5 is a flow chart explaining a transmission operation in a compressed mode according to the first example; Figure 6 is a flow chart that explains reception operation in normal mode according to the first example; Figure 7 is a flow chart explaining a reception operation in compressed mode according to the first example; Figure 8 is a block diagram showing the primary parts of a CDMA system according to a second example; Figure 9 is a diagram explaining the transmission of downlink frame according to the second example; the Figure 10 is a flowchart that explains an operation of transmission in compressed mode according to the second example; Figure 11 is a flow chart explaining an operation reception in compressed mode according to the second example; Figure 12 is a diagram explaining the transmission of downlink frame according to a third example; the Figure 13 is a flowchart that explains an operation of transmission in compressed mode according to the third example; Figure 14 is a flow chart explaining an operation of reception in the compressed mode according to the third example; Figure 15 is a block diagram showing a CDMA system according to a fourth example; Figure 16 is a diagram that explains the memory distribution of a network unit / staggering according to the fourth example; Figure 17 is a diagram explaining downlink frame transmission according to the fourth example; Figure 18 is a diagram of flow explaining a transmission operation in mode compressed according to the fourth example; Figure 19 is a flowchart explaining a reception operation in the compressed mode according to the fourth example; Figure 20 is a block diagram of a CDMA system according to a fifth example; Figure 21 is a diagram explaining the transmission of downlink frame according to the fifth example; the Figure 22 is a flowchart that explains an operation of transmission in compressed mode according to the fifth example; Figure 23 is a flow chart explaining an operation of reception in compressed mode according to the fifth example; Figure 24 is a diagram explaining the transmission of downlink frame according to a sixth example of the present invention; Figure 25 is a flow chart that explains a transmission operation in compressed mode according with the sixth example; Figure 26 is a flow chart that explains a reception operation in compressed mode of agreement with the sixth example; Figure 27 is a diagram of blocks showing a CDMA system according to a seventh example of the present invention; Figure 28 is a diagram that shows the relationship between the power control symbol of transmission and the amount of transmission power control according to the seventh example; Figure 29 is a diagram of flow that explains a power control operation of transmission in compressed mode according to the seventh example;  Figure 30 is a diagram showing the relationship between the control symbol of the transmission power and the amount of transmission power control according to an eighth example; Figure 31 is a flow chart explaining a Transmission power control operation in mode tablet according to the eighth example; Figure 32 is a block diagram showing a CDMA system according to a ninth example; Figure 33 is a diagram explaining the downlink frame transmission according to the ninth example; Figure 34 is a flow chart explaining a Transmission power control operation in mode compressed according to the ninth example; Figure 35 is a flowchart explaining a mode control operation compressed according to the ninth example; Figure 36 is a diagram explaining the conventional frame transmission of a downlink; Figure 37 is a diagram showing a constitution of a broadcasting channel (BCH) frame; the figure 38 is a detailed example of detecting a second code of search in sixteen consecutive slots; Figure 39 is a table showing a correspondence between the second codes of search and randomization code groups; figure 40 is a flowchart that shows when a synchronization setting procedure on the side of the mobile station; Figure 41 is a diagram showing a constitution of a receiver according to a tenth example; the Figure 42 is a diagram showing an outline of the operation of a receiver; Figure 43 is a flow chart that shows when the procedure for establishing the synchronization on the side of the mobile station in a transfer between different frequencies W-CDMA / W-CDMA; Figure 44 shows an example of obtaining of a second search code; Figure 45 shows an example of obtaining a second search code; Figure 46 shows a example of obtaining a second search code; figure 47 shows an example of obtaining a second search code; the Figure 48 shows the constitution of a GSM superframe; and the figure 49 is a flowchart that shows when the synchronization setting procedure on the side of the mobile station in a transfer between different frequencies W-CDMA / W-CDMA.

Best ways to carry out the invention

To explain the present invention with more detail, will be described with reference to the drawings that the accompany.

To begin, the constitution of a CDMA system Figure 1 is a block diagram showing a CDMA system according to a first example; the CDMA system It comprises a transmitter 1A and a receiver 2A. Said CDMA system is equipped with both base stations and mobile stations. The base station and mobile stations carry out communication radio using a CDMA communication procedure.

The transmitter 1A, as shown in Figure 1, comprises a controller 11A, an error correction encoder 12, an interleaver 13, a framing / stepping unit 14A, and the radio frequency transmitter 15. Through the negotiations with the 2A receiver, this 11A controller gives instructions, using raster numbers, of objects for the interleaving appropriate for a normal mode (an uncompressed mode) and a compressed mode In addition, this controller 11A gives the order of a transmission timing to the network unit / stepping 14A in order to reduce the stepping factor and transmit a frame in compressed mode in compressed mode. In addition, controller 11A gives instruction to the transmitter of radiofrequency 15 to increase transmission power average when frames are transmitted in compressed mode.

The error correction encoder 12 encodes the transmitted data flow, thus obtaining the data coded

In order to minimize the effect of transmission errors when continuous bits of a signal are lost transmitted or a similar case, for example as a result of fade, interleaver 13 interleaves the temporal sequence of data encoded in bit units.

This interleaver 13 has a memory for Collate two frames. When the 11A controller has ordered the frame number "1" for interleaving, interleaver 13 interleaves a frame in normal mode. On the other hand, when has ordered frame number "2", interleaver 13 interleaves Two frames in compressed mode.

The truss / step unit 14A Stagger the band in correspondence with normal mode and mode compressed, using a staggering code for each user, and It forms a plot that corresponds to each mode. When the controller 11A has ordered the transmission timing in correspondence with each of the modes, the framing / stepping unit 14A sends the frame to the radio frequency transmitter 15 according With timed transmission timing.

In addition, in compressed mode, the unit of truss / staggering 14A receives an order from controller 11A to reduce the staggering factor, and get a signal of transmission using a stepping factor lower than the staggering factor in normal mode, according to that order. The radio frequency transmitter 15 converts the signal from transmission obtained by the frame / step unit 14A in a radio frequency, and transmits it. Compliant with controller 11A, this radio frequency transmitter 15 outputs the signal from transmission after increasing the average transmission power in the compressed mode at a higher level than the level in mode normal.

As shown in Figure 1, receiver 2A comprises a controller 21A, a correction decoder of error 22, a deinterleaver 23, a dethreading unit / de-stepping 24A, a radio frequency receiver 25, etc. Through negotiations with transmitter 1A, controller 21A mainly controls the operations of deinterleaver 23 and of the de-frame / de-scaling unit 24A. Through the negotiations with transmitter 1A, controller 21A specifies, using raster numbers, the objects for uninterleaving Appropriate for normal mode and compressed mode. Also this controller 21A orders a transmission timing to the 24A deframe / scaling unit in order to reduce the staggering factor and transmit a frame so compressed in compressed mode. In addition, in compressed mode, the controller 11A orders the radio frequency transmitter 15 a reduction in staggering factor in compressed mode, and a reception timing to receive the mode frame compressed.

The radio frequency receiver 25 demodulates the received signals sent from an antenna not shown on the diagram. The 24A deframe / de-stepping unit descaling using scaling codes assigned to 2A receiver users in correspondence with the normal mode and the compressed mode, and creates a frame for each mode. When he controller 21A specifies the reception timings for each mode, the 24A de-frame / de-scaling unit extracts a reception signal from the radio frequency receiver 25 in the timed timing. In addition, in compressed mode, the unit of Deframe / Scaling 24A receives an order from the 11A controller to reduce the staggering factor, and get a reception signal using a lower step factor that the staggering factor in the normal way, according to that order.

Deinterleaver 23 interleaves the sequence temporal data encoded in bit units, in reverse order to interleaved in transmitter 1A (uninterleaved). As the interleaver 13 mentioned above, deinterleaver 23 has a memory to unlock two frames. When the 21A controller has ordered the deintercalado of the plot number "1", the deinterleaver 23 deinterleaves a frame in normal mode. For other part, when the frame number "2" has been ordered, the Deinterleaver 23 Deinterleaves two frames in compressed mode. He error correction decoder 22 decodes the signal interspersed, obtaining decoded data, that is a flow of data received

Next, interleaver 13 will be explained and the deinterleaver 23. Figure 2 is a diagram explaining the interleaver memory distribution according to the first embodiment, Figure 2 (a) illustrates the area used in the mode normal, and Figure 2 (b) illustrates the area used in the mode compressed. In Figure 2, a memory 131A provided is shown. with the interleaver 13. The deinterleaver 23 also comprises a memory that has the same memory size as the memory of the interleaver 13. In the first example, how interleaving is performed in two frames in compressed mode, the sizes of memory of two frames in correspondence with a size of interleaving corresponding to two frames in interleaver 13 and in the deinterleaver 23 respectively.

When interleaving occurs (see figure 2 (a)) in normal mode, only one frame (half) of memory 131A, and interleaving is done within that frame. In contrast, in compressed mode (see figure 2 (b)), are used two frames (all) of memory 131A, and interleaving is performed in those two plots. Similarly, in deinterleaver 23, the used memory area is altered in correspondence with the mode, as in the interleaver.

Next, the transmission of frame including compressed mode. Figure 3 is a diagram that explains the downlink frame transmission according to The first example.

In Figure 3, the vertical axis represents the transmission speed / transmission power and shaft Horizontal represents time. In addition, in Figure 3, F It represents a plot. In a CDMA system, during transmission normal, it provides a period of time to slot the frame and to transmit it intermittently, and the intensity of the Other carrier frequencies are measured using the duration of no transmission during that period.

For this purpose, the slotted frame must compressed, and as shown in figure 3, the duration of the transmission of a compressed frame is half the duration of normal transmission In this case, if the interleaving is done in the same way as in normal transmission, there will be only half  of the necessary interleaving time, making it impossible to achieve adequate interleaving effects.

According to this, to ensure time enough for interleaving, in compressed mode the transmitter 1A and receiver 2A double the areas used in the memories of the interleaver 13 and deinterleaver 23, and interleave through two frames The interleaving time required in compressed mode can easily be determined from the ratio between the frame size and frame compressed mode.

The operation of 1A transmitter transmission. Figure 4 is a flow chart which explains a transmission operation in normal mode, and Figure 5 is a flow chart explaining an operation of Transmission in compressed mode. The execution of operations of figure 4 and of figure 5 is controlled by the controller 11A, individual operations being performed by different sections

In normal mode (see figure 4), it is ordered frame number 1 to interleaver 13 (step S101), and interleaver 13 intersperses a plot. So, when time reaches a time required to transmit a frame (step S102), is ordered a transmission on the next frame to the network unit / stepping 14A (step S103). In this way, in normal mode, frames are transmitted continuously.

In addition, in compressed mode (see figure 5), multiple frames, that is, frame number 2 is ordered at interleaver 13 (step S111), and interleaver 13 interleaves two frames Then, when the time reaches a required time for transmit half frame, that is, frame timing in mode compressed (step S112), a reduction in the factor of staggering and a transmission timing to the unit of trussing / staggering 14A (step S113). What's more, a increase in the average transmission power to the transmitter of radiofrequency 15 (step S114). In this way, in the mode compressed, frames are transmitted intermittently (from way does not continue).

The operation of 2A receiver reception. Figure 6 is a flow chart that explains the reception operation in normal mode, and the Figure 7 is a diagram that explains the reception operation In compressed mode. The operations of figure 6 and figure 7 are executed are executed under the control of controller 21A although individual operations are performed by different sections In normal mode (see figure 6), when the time reaches a frame timing (step S121), a reception delay to the derailing unit / 24A uninterleaved (step S122). Then, a frame number is ordered "1" to deinterleaver 23 (step S123), and deinterleaver 23 uninterlay a plot. In this way, in normal mode, you receive the frames continuously.

In addition, in compressed mode (see figure 7), when the time reaches a half frame, that is, the frame timing in compressed mode (step S131), a reduction in staggering factor and a timing of reception to the 24A deinterleaded / uninterleaded unit (step S132). So, multiple frames, that is, the number frame "2" are ordered to deinterleaver 23 (step S133), and the Deinterleaver 23 Deinterleaves two frames. In this way, in the compressed mode, frames are received intermittently (from way does not continue).

As described above, according to the first example, in compressed mode, the interleaving of units bit that cross multiple frames is controlled in order to minimize the effects of transmission errors, making possible ensure proper interleaving time in compressed mode As in normal mode. As a consequence, it is possible to prevent a poor performance caused by interleaving units of bit.

Also, as the memory size corresponds to number of frames to be interspersed in compressed mode, it is possible to insert the bit units in a sufficient number of frames to minimize the effects of transmission errors when The transmission is in compressed mode.

In the first example described above, Increase memory size to interleave and deintercalate in the compressed mode, thus ensuring an appropriate time of interspersed in correspondence with the size of the interleaved, but The present invention is not restricted to this, and is acceptable. to ensure proper interleaving time by changing the frame transmission procedure in compressed mode without increase memory size, as in a second example explained later. As the entire constitution of the second example of the present invention is the same as the first example already explained, the following description covers only those characteristics of constitution and operation that differ from first example. In addition, the identical components are represented by the same reference numbers.

Here, only the primary constitution will be explained. Figure 8 is a block diagram showing the parts of a CDMA system according to the second example of the present invention In the CDMA system of the second example, the difference with the first example already described is the size of the memory 131B of interleaver 13, which here is of a frame. Further, although not shown in the diagram, the deinterleaver 23 of the receiver also has a frame memory size, for match the size of the interleaver 13.

The frame transmission is explained below. including compressed mode. Figure 9 is a diagram that explains the downlink frame transmission according to The second embodiment. In figure 9, the vertical axis represents the transmission speed / transmission power, and the shaft Horizontal represents time. In the CDMA system, during transmission standard, it provides a period of time to slot the plot and transmit it intermittently, and the intensity is measured of the other carrier frequencies used using the fact that no frames are transmitted during that period. For this purpose, the slotted frame must be compressed, but if the interspersed in the same way as in normal transmission, the interleaving time will be insufficient, and it will be impossible to obtain a proper interleaving effect.

According to this, the timing of the Transmission of the compressed frame is divided, and one part is assigned to the frame header, another is assigned at the end of the same frame, ensuring the desired interleaving time. At receiver, this operation is performed in reverse. As in the first example, the time needed to collate in mode tablet can be easily determined from the ratio between the size of a frame and the frame in compressed mode.

The operation is explained below. Here, only operation in compressed mode is explained. The Figure 10 is a flow chart that explains the operation of transmission in compressed mode, and Figure 11 is a diagram of flow explaining reception operation in mode compressed. In compressed mode (see figure 10) in the transmitter, interleaving is ordered in a frame to interleaver 13 (step S201), and interleaver 13 interleaves a frame.

Then, when the time reaches any of the front or rear timings, of the timing of a frame, (step S202), a transmission timing is ordered to the frame unit /
stepping 14A (Step S203). In addition, an increase in the average transmission power in the radio frequency transmitter 15 (step S204) is ordered, and the compressed mode frame is transmitted in frame at high transmission power. In this way, frames are transmitted intermittently (not continuously) in compressed mode.

Moreover, in compressed mode in the receiver (see figure 11), when the time reaches any of the front or rear timings of the timing of a frame (step S211), a reception timing is ordered to the deframe / de-stepping unit 24A (step S212). Then, after receiving the signal from a frame, a uninterleaving a frame to deinterleaver 23 (step S213), and the Deinterleaver 23 Deinterleaves a frame. In this way, the frames are received intermittently (not so continuous) in compressed mode.

As explained above, agree with the second example, in compressed mode, a frame is compressed which has been interleaved in bit units, arranged within the front and rear in the same frame timing as in normal mode, and transmitted intermittently according to that provision. Therefore, it is possible to ensure a time of appropriate interleaving in compressed mode, in the same way as in the normal mode, with a simple interleaving constitution. For the therefore, the poor functioning caused by the interleaved in bit units.

In addition, it is also possible in the second embodiment prepare the memory sizes shown in the figure 2, and control the interleaving of bit units through frames Multiple in compressed mode. In this case, as in the first example, described above, it is possible to ensure a time of interleaving appropriate both in compressed mode and in mode normal, and to reduce transmission errors that are the Interleaving result in bit units.

In the first embodiment already explained, for perform interleaving and deinterleaving in compressed mode, the memory size is increased and a time of interleaving appropriate for the interleaving size, but the The present invention is not restricted to this, and it is acceptable to ensure an appropriate interleaving time by a procedure of frame transmission in compressed mode different from the second embodiment described above, as in a third example Described below. As the entire constitution of the third example of the present invention is the same as that of the second example already explained, the following description covers only those operating characteristics that differ from the second example.

First, the transmission of frame including compressed mode. Figure 12 is a diagram that explains the downlink frame transmission according to The third example. In Figure 12, the vertical axis represents the transmission speed / transmission power, and the shaft Horizontal represents time. In the CDMA system, during normal transmission, it provides a period of time to slot the plot and transmit intermittently, and the intensity is measured of other frequency carriers using the fact that the frames They are not transmitted during that period. For this purpose, it you must compress the slotted frame, but if the interleaving is done in the same way as in normal transmission, there will be only half of the necessary interleaving time, making it impossible to achieve the proper interleaving effects.

According to this, the duration of the Transmission of the compressed frame is divided into correspondence with multiple slots, and the period of non-transmission (the period unoccupied for measurement) is reduced so as not to affect control of the transmission power, ensuring the desired time of interspersed In the receiver, this operation is performed in reverse. As in the first embodiment, the time needed for the interleaved in compressed mode can easily be determined at from the relationship between the size of a frame and the plot of compressed mode

In addition, slot number N (where N is a natural number) that forms the transmission unit in mode tablet is determined according to the relationship between time of measuring the intensity of other frequency carriers and the Transmission power control error margin. For example, when N = 1 indicates each slot, when N = 2 indicates each two slots, and when N = 4 indicates every four slots. Here, N = 1, 2, and 4 are just the examples and it is also possible to handle others slot numbers

The operation will be explained below. Here, only operation in compressed mode is explained. The Figure 13 is a flow chart that explains the operation of transmission in compressed mode and figure 14 is a diagram of flow explaining reception operation in mode compressed. In compressed mode on the transmitter (see figure 13), the interleaving of a frame to the interleaver 13 and the interleaver 13 interleaves a frame (step S301).

Then, when time reaches the timing of slot N that forms the transmission unit in the compressed mode (step S302), a timing of transmission to frame / step unit 14A (step S303). In addition, an increase in the average power of transmission to the radio frequency transmitter 15 (step S304), and the frame in compressed mode is transmitted in frame at high power of transmission.

In this way, the frames of intermittently (non-continuously) in the mode compressed.

On the other hand, in the compressed mode of the receiver (see figure 14), when the time reaches the slot timing N (step S311), a reception delay to the derailing unit / 24A stepping (step S312). Then, after receiving the signal of a frame, the uninterleaving of a frame is ordered at deinterleaver 23 (step S313), and deinterleaver 23 deinterleaver a plot.

In this way, the frames are received so flashing (not continuously) in compressed mode.

As explained above, agree with the third embodiment, in compressed mode, as a frame compressed is slotted and transmitted intermittently in N slot units, it is possible to receive bit transmission of downlink transmission power control in comparatively short time intervals. In this way, controlling the activation and deactivation of each of the N slots, the margin of error of the control of the potency of transmission.

In particular, as the slot unit N is determined according to the relationship between the measurement time of the intensity of other frequency carriers and the margin of error of the transmission power control, it is possible to ensure the moment in which the intensity of other frequency carriers, and also reduce the margin of Transmission power control error.

In addition, it is also possible in the third example Prepare the memory sizes shown in Figure 2, and control the interleaving of bit units across multiple frames in compressed mode. In this case, as in the first example described above, it is possible to ensure interleaving of appropriate time in compressed mode, as in normal mode, and further reduce transmission errors that are the result of interleave in bit units.

In examples one through three above described, the frame timing was changed in the normal mode and in compressed mode, but the present invention is not limited to this, and it is acceptable to transmit intermittently with it frame timing in compressed mode and in normal mode, as in a fourth example of the present invention described to continuation.

First, the constitution of the CDMA system Figure 15 is a block diagram showing a CDMA system according to a fourth example of this invention. The CDMA system comprises a 1B transmitter and a receiver 2B. Said CDMA system is equipped with a base station and mobile stations The base station and mobile stations lead to conduct radio communications using a procedure of CDMA communication

The 1B transmitter, like the one shown in the Figure 15, comprises a controller 11B, an encoder of error correction 12, an interleaver 13, a unit of trussing / staggering 14B, a radio frequency transmitter 15, etc. Through negotiations with the 2B receiver, the controller 11B mainly controls the operations of interleaver 13, of the truss / step unit 14B, and the transmitter of radio frequency 15. In compressed mode, this controller 11B order the transmission / staging unit 14B for transmission multi-code for multiple frames that are going to be multiplexed in code and transmission timings to transmit the frames of the compressed mode.

The error correction encoder 12, the interleaver 13, and radiofrequency transmitter 15 are the same as the first example already described above and omit their explanation. In relation to interleaver 13, It has a memory to collate a frame.

The 14B framing unit Stagger the band in correspondence with normal mode and mode compressed, using a staggering code for each user, and It forms a plot that corresponds to each mode. When the controller 11B has ordered the transmission timing in correspondence with each of the modes, the framing / stepping unit 14B sends the frame to the radio frequency transmitter 15 according With timed transmission timing. Also, in the mode compressed, the frame / step unit 14B receives a order for multi-code transmission from controller 1B, and multiplexes in code two interleaved post frames according to that order.

In order to multiplex in code two frames, the frame / step unit 14B has a frame memory That is, the interleaver 13 and the unit of truss / staggering 14B each comprises a memory of a frame, allowing the multiplexing in code of two frames that use a total memory size equivalent to two frames

The 2B receiver, as shown in Figure 15, comprises a controller 21B, a correction decoder of errors 22, a deinterleaver 23, a dethreading unit / 24B scaling, a radio frequency receiver 25, etc. TO through negotiations with transmitter 1B, controller 21B mainly controls the operation of interleaver 23 and of the deframe / scaling unit 24B. In the mode compressed, this 21B controller commands the unpacking unit / 24B scaling reception timings for receive multicore transmission and mode frames compressed.

The error correction decoder 22, the deinterleaver 23, and the radiofrequency transmitter 25 without the same as the example already described above, and a explanation of them. In relation to deinterleaver 23, this one It has a memory to collate a frame.

As the 14B framing unit described above, the deframe unit / 24B scaling comprises a frame memory for the uninterleaved When the 21B controller has ordered a reception timing in correspondence with each of the modes, the 24B de-frame / de-scaling unit extracts the radio frequency transmitter reception signal 25 according with that reception timing. Also, in compressed mode, the 24B de-frame / de-escalation unit receives an order for multi-code transmission of controller 21B, separate the data offset in frame units according to that order, and pulls the frames in sequence to the deinterleaver 23.

Next, the constitution is explained primary of the 14B framing unit and the deframe / de-stepping unit 24B. Figure 16 is a diagram explaining the memory distribution of the unit of truss / staggering 14B according to a fourth embodiment, in which Figure 16 (a) illustrates the area used in normal mode, and Figure 16 (b) illustrates the area used In compressed mode. In Figure 16, the framing unit / Step 14B has a memory 141A. The unraveling / 24B scaling also has a memory of the same size as memory than that of the frame / step unit 14B.

In the fourth example, such as multiplexing in the code is done through two frames in compressed mode, a memory size of a frame is set in correspondence with the multiplexing size in the two-frame code, both in the 14B framing unit as in the unit derailing / scaling 24B. in fact, the fabric and two frames unraveled can be achieved using the memories of a frame of interleaver 13 and deinterleaver 23.

In normal mode (see Figure 16 (a)), as multiplexing in the code is not necessary, the framing and so on is carried out based on the data interleaved by interleaver 13 without using memory 141A. on the contrary, in compressed mode (see Figure 16 (b)), a two-frame memory size is required to perform multiplexing in the code, and consequently memory 141A of the framing / staging unit is used 14B in addition to the interleaver memory 13. Similarly, whether or not the deinterleaving unit memory is used /
24B scaling also varies, depending on the mode.

Next, the transmission of frame including compressed mode. Figure 17 is a diagram that explains the downlink frame transmission according to The fourth example. In Figure 17, the vertical axis represents the transmission speed / transmission power, and the shaft Horizontal represents time. Also, in Figure 17, F It represents a plot. In the CDMA system, during transmission normal, it provides a period of time to slot the frame and transmit it intermittently, and measure the intensity of the other frequency carriers using the fact that the plot is not transmitted during that period.

For this purpose the plot must be compressed grooved, and in conventional procedures, the duration of transmission of a compressed frame becomes half of the duration of normal transmission. In this case, if the interspersed in the same way as in normal transmission, there will be only half the interleaving time needed, making impossible to achieve the appropriate interleaving effects.

Accordingly, transmitter 1B performs the interleaved the same size as in normal mode, and multiplexed in code multiple frames in frame timing in order to ensure the same interleaving timing in mode compressed as in normal mode, in compressed mode. By example, in the example shown in figure 17, in the transmission normal (normal mode), the interleaved post frames are transmitted in a sequence of frames 1, 2, and successive, in slotted transmission (compressed mode), frames individually interspersed 3 and 4 are multiplexed in code together, and they transmit compressed frames.

The operation is explained below. How transmission and reception are done in the same way that in conventional procedures, the explanation of the same. First, the operation of 1B transmitter transmission. Figure 18 is a flow chart which explains the transmission operation in compressed mode. The execution of the operation of Figure 18 is controlled by middle of the 11B controller although the individual operations are made by the different sections. In compressed mode, it orders the interleaving of a frame to the interleaver 13 (step S401) and interleaver 13 interleaves in a frame.

So, when time reaches a frame timing given for multi-code transmission (step S402), multi-code transmission and timing of are ordered transmission to the frame / step unit 14B (step S403). Therefore, the truss / step unit 14B multiplexes in the code two frames. In this way, in the mode compressed, frames are transmitted intermittently (no keep going).

The operation of 2B receiver reception. Figure 19 is a flow chart that It explains the reception operation in compressed mode. The execution of the operation of figure 19 is controlled by the 21B controller although individual operations are performed by the different sections. In compressed mode, when the time reaches frame timing for transmission multicode described above (step S411), the frame separation of the multiplexed code data received and a reception delay to the de-frame unit / 24B de-stepping (step S412).

Then, the deintercalado in frames is ordered separated from the deinterleaver 23 (step S413), and the deinterleaver 23 uninterlay a plot. In this way, in compressed mode, the frames are received intermittently (not so keep going).

As described above, according to the fourth example, in compressed mode, multiple frames are compressed that have been interleaved in bit units to minimize effects of transmission errors, through multiplexing by code division in the given frame timing before the broadcast. Therefore, it is possible to ensure a time of appropriate interleaving in the same way and using the same constitution in compressed mode and in normal mode. This way, controlling the activation / deactivation in each frame of compressed mode, poor performance caused by the interleaved in bit units.

In addition, as the memory size used corresponds to the number of frames that are going to be multiplexed in code in compressed mode, code multiplexing can performed reliably and without loss in compressed mode.

In addition, it is also possible in the fourth example controlling interleaving of bit units across multiple frames in compressed mode in the same way as in the first example described above. In this case, it is possible to ensure a longer time for interleaving increasing the size of interleaver and deinterleaver memories in mode Compressed as in normal mode. As a consequence, they can reduce transmission errors that are the result of interleaved in bit units. In particular, when they are sandwiched multiplexed frames in code by replacing others frames, places where multiple frames can be dispersed multiplexed in code contain errors, improving the result error correction coding corrector.

In examples 1 to 4 described above, the transmission power is increased in order to transmit frames in compressed mode without loss of information, but the The present invention is not limited to this, and it is acceptable to determine the amount of transmission power after considering the interference on other user channels caused by the amount of transmission power, as described in continuation in a fifth example.

First, the constitution of the CDMA system Figure 20 is a block diagram showing a CDMA system according to a fifth example of this invention. The CDMA system comprises a 1C transmitter and a receiver 2 C. Said CDMA system is provided with both base stations and of mobile stations. The base station and mobile stations carry out radio communication using a procedure of CDMA communications

As shown in Figure 20, transmitter 1C comprises a controller 11C, an error correction encoder 12, an interleaver 13, a framing / stepping unit 14C, a radio frequency transmitter 15, etc. Through the negotiations with 2C receiver, the 11C controller mainly controls the operations of interleaver 13 of the unit 14C framing / staggering, and radio frequency transmitter 15. In compressed mode, this 11C controller commands the unit trussing / staggering 14C a reduction in the speed of information and transmission timings to transmit the compressed mode frames. In addition, this 11C controller will differs from that of examples 1 to 4 described above in that does not generate an order to the radio frequency transmitter 15 to Increase transmission power in compressed mode.

The error correction encoder 12, the interleaver 13, and radiofrequency transmitter 15 are the same as those of the first example already described above, and omit their explanation. In relation to interleaver 13, It has a memory to collate a frame.

The 14C framing unit Stagger the band in correspondence with normal mode and mode compressed, using a staggering code for each user, and It forms a plot that corresponds to each mode. When the controller 11C has ordered a transmission timing in correspondence with each of the modes, the framing / stepping unit 14C sends the frame to the radio frequency transmitter 15 according With transmission timing. Also, in compressed mode, when the 14C framing unit receives an order to reduce the speed of information coming from the controller 11C then compresses the insufficiently interleaved frame to form a compressed mode frame in accordance with that order.

As shown in Figure 20, the 2C receiver it comprises a controller 21C, a decoder of correction of errors 22, a deinterleaver 23, a dethreading unit / 24C de-stepping, a radio frequency transmitter 25, etc. TO through negotiations with the 1C transmitter, the 21C controller mainly controls the operations of interleaver 23 and the 24C deframe / de-stepping unit. In the mode compressed, this 21C controller commands the unpacking unit / 24C scaling a reduction in information speed and reception timings to receive mode frames compressed.

The error correction decoder 22, the deinterleaver 23, and the radiofrequency transmitter 25 are the same as in the first example already described above, and omit their explanation. In relation to the deinterleaver 23, has a memory to collate a frame.

When the 21C controller has ordered a reception timing in correspondence with each of the modes, the 24C deframe / de-scaling unit extracts the signal received from radio frequency transmitter 25 according to That reception timing. Also, in compressed mode, when the 24C deframe / de-scaling unit receives a order to reduce the speed of information coming from 21C controller, then reduce the information speed of according to that order, it carries out the framework and de-stepping and takes out the frames in sequence to the deinterleaver 23.

Next, the transmission of frame including compressed mode. Figure 21 is a diagram that explains the frame transmission of a downlink according With the fifth example. In Figure 21, the vertical axis represents the transmission speed / transmission power, and the shaft Horizontal represents time. In the CDMA system, during normal transmission, it provides a period of time to slot the plot and transmit it intermittently, and the intensity is measured of other frequency carriers using the fact that transmits a frame during that period. For that purpose, the slotted weft must be compressed, and in a conventional procedure, transmit power is increased when transmitting the frame compressed In this case, the amount of interference power a other user channels increases, leading to a deterioration of the transmission.

According to this, as shown in the figure 21, when the same transmission power is ensured in mode compressed as in normal mode, reducing the speed of transmission in a corresponding amount, and a frame of interleaved transmission across multiple mode frames compressed, it is possible to transfer between frequencies with reduced interference

The operation is explained below. How transmission and reception are done in the same way that in conventional procedures, an explanation is omitted from the same. First, the operation of 1C transmitter transmission. Figure 22 is a flow chart which explains the transmission operation in compressed mode. The execution of the operation of Figure 22 is controlled by the 11C controller although the individual operations are made by the different sections. In compressed mode, it orders the interleaving of a frame to the interleaver 13 (step S501), and interleaver 13 interleaves a frame.

Then, when time reaches the frame timing of compressed mode (step S502), the transmission speed reduction and timing of transmission to the frame / step unit 14C (step S503). Consequently, the frame is transmitted at a rate of Lower transmission in compressed mode time. This way, in compressed mode, frames are transmitted so intermittent (not continuously).

The operation of 2C receiver reception. Figure 23 is a flow chart that It explains the operation of the reception in the compressed mode. The Execution of the operation of Figure 23 is controlled by the 21C controller although individual operations are performed by the different sections. In compressed mode, when the time reaches the frame timing of compressed mode (step S511), it order a reduction in transmission speed and a Timing of reception to the unpacking unit / 24C de-stepping (step S512).

Then, the deintercalado in the plot is ordered to the deinterleaver unit 23 (step S513), and the deinterleaver 23 interlock a plot. In this way, in compressed mode, you receive frames intermittently (not in a way keep going).

As described above, according to the fifth example, in compressed mode, frames are transmitted intermittently compressed at a transmission rate that is lower than the transmission speed in normal mode using the Same transmission power as in normal mode. By consequently, during the frequency transfer, the amount of interference power to other users on the same frequency will reduce. Therefore, it is possible to transfer between the frequencies with less interference.

Also, in the fifth example, in the mode compressed, a compressed weft can be divided into the part front and rear of the same frame timing as in the normal mode, and be transmitted intermittently in accordance with this arrangement, as in the second embodiment described previously. Due to this fact, it is possible to ensure a time of interleaved appropriately in compressed mode in the same way as in normal mode, with a simple interleaving constitution. How result, the poor performance caused by the interleaved in bit units.

Also, in the fifth example, in the mode compressed, a compressed frame can be slotted and transmitted from intermittent way in N slot units in the same way as in the third example described above. Because of this fact, it is possible to receive the transmission power control bits transmitted on the downlink in time intervals comparatively short. As a result, the amount of error in the transmission power control.

In the fifth example described above, interleaved a frame, but the present invention is not limited to this, and it is acceptable to avoid compression at interleaving time by interleaving through multiple frames. With the exception of the increase in interleaver memory size, such as In the first example, the sixth example has the same constitution global than the fifth example described above, and of this form only the differential aspects of the functioning.

According to this, the transmission will be explained of frame including compressed mode. Figure 24 is a diagram which explains the downlink frame transmission agree With the sixth example. In Figure 24, the vertical axis represents the transmission speed / transmission power, and the shaft Horizontal represents time. The difference with the fifth example  described above is that, as shown in figure 24, the interleaving is carried out by multiple frames, ie two frames if the compressed mode frame is half frame. By consequently, the deterioration of decoding can be reduced caused by compression of interleaving time.

The operation is explained below. How the transmission and reception have been made of it so that in conventional procedures, the explanation of them. First, the transmitter transmission operation of the sixth example. The Figure 25 is a flow chart that explains the operation of Transmission in compressed mode. Performance Execution of Figure 25 is controlled by controller 11C although the individual operations are performed by the various sections In compressed mode, interleaving is ordered through two frames to interleaver 13 (step S601), and interleaver 13 intersperse two frames.

Then, when time reaches the frame timing of compressed mode (step S602), the transmission speed reduction and timing of transmission to the frame / step unit 14C (step S603). Consequently, the frame is transmitted at a rate of Lower transmission in compressed mode time. This way, in compressed mode, the frames are transmitted so intermittent (not continuously).

The operation of reception according to the receiver of the sixth example. Figure 26 it is a flow chart that explains a reception operation In compressed mode. The execution of the operation of the figure 26 is controlled by controller 21C although operations Individuals are made by different sections. At compressed mode, when the time reaches frame timing in compressed mode (step S611), a reduction of the transmission rate and a reception timing at 24C deframe / de-stepping unit (step S612).

Then, the uninterleaving is ordered through two frames to the deinterleaver 23 (step S613), and the deinterleaver 23 uninterlay two frames. In this way, in compressed mode, frames are received intermittently (not so keep going).

As described above, according to the sixth example, in addition to what has been described in the fifth example, as described above, in compressed mode, the Bit units are interleaved across multiple frames, allowing to ensure an appropriate interleaving time both in the Compressed mode as in normal mode. As a consequence, they can further reduce transmission errors caused by the interleaving of bit units.

Also, in the sixth example, in the mode compressed, a compressed weft can be divided into front and rear of the same frame timing as in normal mode, and be transmitted intermittently in accordance with this configuration in the same way as in the second example described previously. Due to this fact, it is possible to ensure a time of interleaved appropriately in compressed mode in the same way as in normal mode, with a simple interleaving constitution. How result, poor performance caused by the interleaved in bit units.

Also, in the sixth example, in the mode compressed, a compressed weft can be grooved and can be intermittently transmit on the N slot units of the same so in the third example described above. Because this fact, it is possible to receive the power control bits of transmission transmitted on the downlink at intervals of comparatively shorter time. As a result of this, you can reduce the amount of errors in the control of the power of transmission.

In the aforementioned examples of 1 to 6, a function was explained to prevent deterioration of the transmission in compressed mode, but the present invention is not limited to this, and it is acceptable to vary the amount of power of transmission, during the control of the transmission power as in a seventh example described below.

First, the constitution of the CDMA system Figure 27 is a block diagram showing a CDMA system according to a seventh example of this invention. The CDMA system comprises a 1D transmitter and a receiver 2D. Said CDMA system is provided with a base station and mobile stations The base station and mobile stations carry carry out radio communication using the procedure of CDMA communications

As shown in Figure 27, the 1D transmitter it comprises an 11D controller, a correction encoder of errors 12, an interleaver 13, a framing unit / stepping 14D, a radio frequency transmitter 15, etc. TO through negotiations with the 2D receiver, the 11D controller mainly controls the operation of interleaver 13, of the 14D framing / stepping unit, and transmitter radio frequency 15. This 11D controller provides information on compressed mode such as transmission timings in the compressed mode to the frame / step unit 14D. In addition, this 11D controller orders the increase or decrease of the transmission power to the radio frequency transmitter 15, based on the received power information and the information of TPC bit received from the 2D receiver through a link upward.

The error correction encoder 12, the interleaver 13 and radiofrequency transmitter 15 are the same than the first example already described above, and the explanation of them. In relation to interleaver 13, it has A memory to collate a frame. In addition, the transmitter of radio frequency 15 increases or decreases the transmission power of according to the instruction of increase or decrease of power transmission of the 11D controller, and outputs the signals from transmission.

The frame / step unit 14D is assigns you operations such as band staggering in correspondence with normal mode and compressed mode, using a stepping code for each user, forming a frame that corresponds to each mode, and, when the 11D controller has ordered a transmission timing in correspondence with each of the modes, sending the frame to the radio frequency transmitter 15 of I agree with that transmission timing.

As shown in Figure 27, the 2D receiver It comprises a controller 21D, a decoder of correction of errors 22, a deinterleaver 23, a dethreading unit / 24D scaling, a radio frequency transmitter 25, etc. TO through negotiations with the 1D transmitter, the 21D controller mainly controls the operations of deinterleaver 23 and of the 24D deframe / de-scaling unit. In the mode compressed, this 21D controller provides frame information compressed, such as reception timings and so on receive frames in compressed mode, to the derailment unit / 24D scaling.

The error correction decoder 22, the deinterleaver 23, and the radiofrequency transmitter 25 are the same as in the first example already described above, and omit their explanation. Here, the deintercalator 23 It has a memory to collate a frame. Also, when the radio frequency receiver 25 has received a reception signal, notifies the 21D controller of information (information on reception power) showing the reception power.

When the derailing unit / 24D scaling received reception timings in correspondence with each of the modes of the 21D controller, extracts the reception signal from the radio frequency transmitter 25 of according to reception timings. Also, in the mode compressed, this 24D deframe / scaling unit receives the compressed frame information from the 21D controller and perform the de-stacking / scaling, and take out sequentially the frames to the deinterleaver 23. In addition, the derailing unit / 24D scaling detects the TPC bits of the received signal, and notifies the 21D controller of these.

Next, the relationship between the TPC bits and the amount of transmission power control. The Figure 28 is a diagram showing the relationship between the symbols of control of the transmission power and the quantities of Transmission power control according to the seventh example. The table shown in Figure 28 is retained by the 11D controller of the 1D transmitter and also the 21D controller of the 2D receiver The TPC bit is the power control symbol of transmission, and as it comprises a bit, it has two states: 1 (ON) and 0 (OFF). In normal mode, a transmission power control amount of +1.0 dB (decibels) in state 1 (ON) and a quantity of -1.0 dB transmission power control in state 0 (DISABLED). That is, the power control unit of Transmission in normal mode is 1 dB.

Moreover, in compressed mode, it applies a transmission power control amount of +3.0 dB (decibels) in state 1 (ON), and a quantity of Transmission power control of -3.0 dB in state 0 (DISABLED). That is, the power control unit of Transmission in normal mode is 3 dB. The control unit of transmit power used in compressed mode has a value absolute greater than the value used in normal mode, for the reason of that the unoccupied period (non-transmission timing) in the compressed mode decreases the ability to adhere to the control of potency of transmission.

The operation is explained below. He seventh example, differs from the other embodiments with respect to its transmission power control function, and by consequently only the control of the power of transmission. Figure 29 is a flow chart explaining the Transmission power control operation in mode compressed according to the seventh embodiment. Power control Transmission of the 1D transmitter and 2D receiver explained here is the control of the transmission power to a link upward.

A TPC bit of the 2D receiver and the information of the Receive power on the side of the 2D receiver are sent to the 1D transmitter. In the 1D transmitter, when the TPC bit is received and the reception power information (step S701), the information of the increase / decrease in transmission power is determined based on this information received (step S702).

Then, the transmission from the transmitter of radiofrequency 15 is controlled at that transmit power determined (step S703).

More specifically, for example, when there is a TPC bit, an instruction is made to increase the power of transmission, and therefore the control of the power of +3 dB transmission from the table in Figure 28. Therefore, an instruction is sent to be transmitted after raising the current transmission power in 3 dB to the transmitter of radiofrequency 15. On the other hand, when the TPC bit is 0, it is given an instruction to decrease the transmission power, setting the transmission power control of -3 dB from the table of the Figure 28. Therefore, an instruction is sent to transmit after the decrease of the current transmission power by 3 dB to the radio frequency transmitter 15.

As described above, according to the seventh example, in compressed mode, the power of transmission is controlled so that the control unit of the transmission power for a transmission is greater than in the normal mode, and therefore, even when the intervals Temporary transmission power control during intermittent transmission are wider, it is possible to widen the transmission power control interval and keep the Adhesion to transmission power in compressed mode. How consequently, the amount of control error can be reduced Transmission power in compressed mode.

Also, in the seventh example, in the mode compressed, you can slot a compressed weft and you can intermittently transmit in N slot units thereof so that in the third embodiment described above. By consequently, it is possible to transmit the control bits of the transmission power in the downlink at intervals of comparatively short time. As a result, the amount of error in the transmission power control.

In the seventh example mentioned above, the states of the TPC bit were limited to two types of increase and decrease, but the present invention is not limited to this, and is acceptable to vary the amount of transmission power control for each mode, as in the eighth example explained below. The eighth example has the same global constitution as the seventh embodiment described above, and in this way only will explain below the differential aspects of functioning. In the following explanation, the numbers will be used reference figure 27.

First, the relationship between the TPC bits and the amount of transmission power control. The Figure 30 is a diagram showing the relationship between the symbols of control of the transmission power and the quantities of transmission power control according to the eighth example. The table shown in Figure 30 is retained by the 11D controller of the 1D transmitter and also by the 21D controller of the 2D receiver.

In the eighth example, the TPC bit is the symbol of Transmission power control, and there are two bits. Thus, There are four types of states: (11B (B represents a binary number), 10B, 01B, and 00B). The two binary states TPC 11B and 10B represent an increase in transmission power, and the two binary states TPC 01B and 00B represent a decrease in the power of transmission.

In normal mode, as in the seventh example described above, there are only two types of states, ON and DISABLED. However, since only two TPC bits are used, ON is 11B and OFF is 00B. When the TPC bits are 11B the control power transmission amount is +1 dB, and when these are 00B the amount of transmission power control It is -1 dB. Similarly, in compressed mode, as in the seventh example described above, when the TPC bits are 11B the amount of transmission power control increases by three times the amount of transmission power control that of normal mode, namely +3 dB. When the TPC bits are 00B it is increased the amount of transmission power control in three times the amount of transmission power control mode normal, namely -3 dB. In the eighth example four types apply of variation to the amount of transmission power control in compressed mode, so that when the TPC bits are 10B, the control power transmission amount be +1 dB, and when these are 01B, the amount of power control of transmission be -1 dB.

In normal mode, when the TPC bits are in the state 11B, an amount of power control of +1.0 dB transmission (decibels), and in state 00B, applies a transmission power control amount of -1.0 dB. That is, the transmission power control unit in the Normal mode is 1 dB. In normal mode, there is no stipulation about states 10B and 01B, and the power of Transmission remains in its current state during this mode.

On the other hand, in compressed mode, when TPC bits be 11B, one applies a control amount of the transmission power of +3.0 dB (decibels), and when the bits TPC be 00B, an amount of power control of -3.0 dB transmission. That is, when the TPC bits are 11B or 00B, the transmission power control unit in mode Normal is 3 dB.

Also, in compressed mode, when the bits TPC be 10B, a power control amount of +1.0 dB (decibel) transmission, and when the TPC bits are 01B, a transmission power control amount of -1.0 dB That is, when the TPC bits are 10B or 01B, the unit of Transmission power control in compressed mode is 1 dB

Thus, the power control unit is varied of transmission in compressed mode in order to improve the adhesion capacity of the transmission power control, making it possible to properly accommodate changes in the unoccupied period (non-transmission timing) in mode compressed.

The operation is explained below. He eighth example differs from the other embodiments with respect to its transmission power control function, and by consequently only the control of the power of transmission. Figure 31 is a flow chart explaining the operation of transmission power control in mode compressed according to the eighth example. The control of the 1D transmitter and 2D receiver transmit power explained here is the control of the transmission power to a uplink

A TPC bit is sent to the 1D transmitter from the 2D receiver and reception power information on the side of the 2D receiver. When the 1D transmitter receives the TPC bit and the Receiving power information (step S801) determines the value of the TPC bits (step S802). Then, the table is consulted of figure 30, and an increase / decrease information is set of the desired transmission power, based on the determination in step S802 (step S803). Then, transmission to the transmitter of radiofrequency 15 is controlled at the transmit power set (step S804).

More specifically, for example, when the bits TPC be 11B, an instruction is given to increase the power of transmission, and the transmission power control of +3 dB from the aforementioned table in figure 30. By consequently, an instruction is sent to transmit after increase the current transmission power by 3 dB to the transmitter radiofrequency On the other hand, when the TPC bits are 00B, it is given an instruction to decrease the transmission power, setting the transmission power control of -3 dB from the table before mentioned in Figure 30. Therefore, a instruction to transmit after decreasing the power of 3 dB current transmission to the radio frequency transmitter 15.

In addition, when the TPC bits are 10B, a instruction to increase the transmission power, and the transmission power control at +1 dB from the table before mentioned in Figure 30. Therefore, a instruction to transmit after increasing transmission power current at 1 dB to the radio frequency transmitter 15. On the other hand, when the TPC bits are 01B, an instruction is given to decrease the transmission power, setting the control of the power of -1 dB transmission from the aforementioned table in Figure 30. Therefore, an instruction is sent to transmit later to decrease the current transmission power by 1 dB at radio frequency transmitter 15.

As described above, according to the eighth example, the transmission power is controlled in compliance with the power control units of transmission in correspondence with normal mode and mode compressed, and also, in correspondence with the intervals Temporary transmission power control in mode compressed. Therefore, in compressed mode, even when Temporary intervals of transmission power control fluctuate and become long during intermittent transmission, it is possible to use a transmission power control interval appropriate, and therefore maintain adherence to the potency of transmission. As a consequence, the amount of transmission power control error in mode compressed.

The number of TPC bits and the power of transmission is greater than in the seventh example described previously. However, the transmission power is in any major case in compressed mode so that the power required transmission of the TPC bit is obtained by that power higher. Therefore, there is a merit that the error ratio transmission has almost no effect on the operation of the control.

Also, in the eighth example, in the mode compressed, you can slot a compressed weft and you can transmit intermittently on the N slot units of the same way as in the third example described above. By consequently, it is possible to receive the power control bits downlink transmission in time intervals comparatively short. As a result, the amount of error in the transmission power control.

In embodiments 1 to 8 explained previously, the format of the transmission in compressed mode has a constitution to maintain the operation of interleaved and the precision of the power control of transmission, but the present invention is not limited to this, and is acceptable to set the transmission format in consideration of the reduction of the number of staging codes used, as in The next ninth example.

First, the constitution of a base station on which the CDMA system of a Ninth example of the present invention. The constitution of Mobile stations will not be explained here. Figure 32 is a diagram of blocks showing an example of a constitution of a base station according to the ninth example of this invention. As shown in Figure 32, this base station it comprises a transmitter group 100, an adder 110, a transmitter of radio frequency 120, a compressed mode controller 200 that connects to transmitter group 100 and which controls the transmission in the compressed mode, etc. Radio communication between the station base and mobile stations not shown in the diagram is made using the CDMA communications procedure.

The transmitter group 100 comprises multiple 1 to M transmitters (where M is a natural number) to create data transmission independently for users in correspondence with a number of users that can be given service. Each of the 1 to M transmitters has the same Constitution. The constitution will be explained taking as an example the transmitter 1. As shown in Figure 32, transmitter 1 comprises a controller 11E, the correction encoder of errors 12, interleaver 13, a framing unit / stepping 14E, a power control amplifier of transmission 16, etc.

Through negotiations with the controller in compressed mode 200, the 11E controller mainly controls the interleaver 13 operations of the framing unit / stepping 14E, and the power control amplifier of transmission 16. In compressed mode, the 11E controller facilitates transmission timings to transmit frames in mode  compressed, and stepping codes that have a factor of  lower staggering than those normally used for frames in compressed mode, to the framing / stepping unit 14E.

The error correction encoder 12 and the interleaver 13 are the same as those in the first example already described above, and their explanation is omitted. In relation to interleaver 13, it has a memory for interleaving a plot.

The 14E framing unit stagger the band using the staggering codes of different stepping factors in correspondence with the normal mode and the compressed mode, and forms a frame for each mode. When he 11E controller has ordered transmission timings in correspondence with each of the modes, the framing unit / stepping 14E sends the frames to the control amplifier of the transmission power 16 according to the timing of transmission. In addition, in compressed mode, the framing unit / stepping 14E receives an instruction from controller 11E to decrease the staggering factor, and according to that instruction gets a transmission signal that uses a factor of lower staggering than in normal mode.

In accordance with controller control 11E, the transmission power control amplifier 16 amplifies the average transmission power of the transmission signal, obtained by the frame / step unit 14E, in the compressed mode compared to normal mode, and outputs the signal from transmission. The 1 to M transmitters independently determine whether use or not compressed mode transmission, and also, as the compression ratio in compressed mode is set independently by independent transmitters 1 to M, the 16 power transmission control amplifiers are provided independently to transmitters independent 1 to M.

Adder 110 adds the transmission signals taken from transmitters 1 to M comprising the transmitter group 100, and sends them to the radio frequency transmitter 120 provided in The last stage The radio frequency transmitter 120 converts the signal output obtained by adder 110 in a radio frequency, and transmits it. A base transmitter is provided at each base station radiofrequency 120.

As shown in Fig. 32, the compressed mode controller 200 comprises a compressed mode manager 201, a frame combination controller 202, a staging code assignment controller 203, a transmission timing controller 204, etc. The compressed mode manager 201 manages the compressed mode of each transmitter in the transmitter group 100, and extracts / enters control data for the mode
compressed.

The frame combination controller 202 receives transmission period information about the mode frames compressed transmitters that perform mode transmission compressed from the compressed mode manager 201. Compliant to that transmission period information, the controller of frame combination 202 searches among the multiple frames so compressed a combination of frames that have a timing total transmission that is within a frame duration.

The code assignment controller staggering 203 assigns a staggering code, so that it is used for staggering a frame in compressed mode, at transmitters that transmit in compressed mode. The controller of transmission timing 204 controls the timings at that the frames will be transmitted in compressed mode in the mode compressed.

The frame transmission is explained below. including compressed mode. Figure 33 is a diagram that explains the frame transmission of a downlink according With the ninth example. In Figure 33, the vertical axis represents the transmission speed / transmission power, and the shaft Horizontal represents time. In the CDMA system, during normal transmission, it provides a period of time to slot the plot and transmit it intermittently, and the intensity is measured of other frequency carriers using the fact that the frames they are not transmitted (unoccupied period) during that period.

For that purpose, the plot must be compressed grooved, and in a conventional procedure, the factor is decreased stepping when transmitting the compressed weft. In this case, a smaller number of scaling codes must be assigned that have a lower staggering factor to each user that carry out the transmission in compressed mode, consuming valuable staging code resources.

According to this, as shown in the figure 33, for example during compressed mode transmission between the base station of figure 32 and the mobile stations M1 and M2, are collects a group of compressed frame frames from the frames of compressed mode created by multiple users in such a way that the collected group have a total transmission period of less than one frame duration The same staggering code that has a Low staggering factor is assigned to each frame of the group, and these are transmitted at times when they do not overlap inside of a frame duration, thus allowing multiple stations phones share a staggering code. This is, in the link descending for mobile stations M1 and M2, different codes stepping A and B are fixedly assigned to the M1 and M2 mobile stations during normal mode (transmission normal).

On the contrary, in compressed mode (slotted transmission), a staggering code C is assigned identical to the two mobile stations M1 and M2, and the timings of compressed mode frame transmission of mobile stations M1 and M2 are controlled so that their timing of transmission using both the staggering code C does not overlap, allowing to transmit the frame in compressed mode of each one during the unoccupied period T2 or T1 of the other.

The operation is explained below. First, the operation of the unit will be explained 14E framing / staggering during compressed mode in the transmitters 1 to M. Figure 34 is a flow chart that explains the operation of the transmission in the compressed mode of according to the ninth example of the present invention. The execution of the operation of figure 34 is controlled by the controller 11E although individual operations are performed by different sections In compressed mode, interleaving is ordered of a frame to interleaver 13 (step S901), and interleaver 13 insert a plot. Then, the information related to the plot compressed mode is taken to compressed mode controller 200 (step S902).

Then, a negotiation with the compressed mode controller 200, and an instruction of step factor (step code) of the controller 200 compressed mode and a frame transmission timing compressed to the frame / step unit 14E (step S903). In addition, the control amplifier of the transmission power 16 that increases the average power of transmission (step S904), and the frame is transmitted in compressed mode at high transmission power. In this way, they are transmitted frames intermittently (not continuously) in mode compressed.

Next, the operation of compressed mode control of the compressed mode controller 200. Figure 35 is a flow chart explaining the compressed mode control operation according to the Ninth example. The operation of figure 35 is controlled by the compressed mode manager 201 although the operations individual are made by the different sections in the compressed mode controller 200. In Figure 35, the information related to the compressed mode through communication between transmitters 1 to M.

According to this, the channels are checked to determine if they are in compressed mode (step S911). Then, when it has been confirmed that there are multiple channels in the compressed mode (step S912), the transmission period is checked of the compressed mode frame on each channel in the compressed mode (step S913). On the other hand, if there are not multiple channels in the mode compressed in step S912, the processing returns to step S911.

When the transmission period is checked in step S913, the transmission periods of the frames are calculated compressed mode extracted from each channel in compressed mode together in a given combination to form a duration of transmission. Then, it is determined whether the total times of the combinations include any combination that can fit within a frame duration (step S914).

As a result of this, when there is a combination that can fit in a frame duration, that combination is used for frame transmission in compressed mode by assigning a single step code and mutually differentiating transmission timings to channels (transmitters) of compressed mode frames included in the combination (step S915). On the other hand, if there is none combination that can fit in a frame duration, cannot be transmit multiple channels with a single step code, and in this way the processing returns to step S911.

As described above, according to the ninth example, in the compressed mode controller 200, is extract a combination of the given combinations of multiple compressed mode frames compressed by independent users in the transmitter group 100, the combination having a total transmission timing less than one frame duration, the same staging code is assigned to each of the multiple channels that transmit the extracted combination, and the transmission timings of compressed mode frames that understand the combinations extracted above are controlled from such that they do not overlap in time within a duration of frame, using the same step code. Due, when there are multiple frames of compressed mode, it is possible to reduce the number of step codes having low factors of stepping used in compressed mode. As a result, the staging code resources can be used so Effective in compressed mode.

Also, in the ninth example, in the mode compressed, a compressed weft can be divided into the part front and rear of the same frame timing as in the normal mode, and be transmitted intermittently according to that configuration in the same way as in the second example described previously. Therefore, it is possible to ensure a time of interleaved appropriately in compressed mode in the same way as in normal mode, with a simple interleaving constitution. As a result, the poor performance caused by the interleaved in bit units.

Also, in the ninth example, in the mode compressed you can slot a frame and transmit it so flashing in N slot units in the same way as in the third example described above. Therefore it is possible receive the transmission power control bits transmitted on the downlink in time intervals comparatively short. As a result, the amount of error in the transmission power control.

In the previous explanation, it has only been shown a sample of an example combination of the parts characteristics of examples 1 to 9, and of course you can make other combinations of them.

Examples 1 to 9 of the present invention were explained above, but several are possible modifications within the range of the main points of the present invention, and these are not excluded from the margin of the invention.

Examples 1 to 9 described above explain how a period of time is provided to slot the frame and transmit it intermittently and the intensity of other frequency carriers using non-transmission time, that is, the unoccupied period, during that period. However the procedure to establish synchronization between stations phones and the base station in a real transfer between different Frequencies was not mentioned. Therefore, it is explained to then a communication device capable of performing transfers between different frequencies using the invention, and a procedure for establishing the synchronization of same.

First, it is explained, before describing a handover between different frequencies, the constitution of the information transmitted and received between mobile stations and the Base station.

Figure 37 shows a frame constitution of a broadcasting channel (BCH). In a system W-CDMA, as shown in Figure 37 (a), a broadcasting channel frame comprises sixteen slots, by example, corresponding to 1 to 16 in the diagram. In addition, as shown in figure 37 (b), a slot comprises ten symbols (representing a staggering code cycle). In this constitution, the four symbols shown by "P" in the diagram are necessary pilot symbols to detect the phase information, the five symbols shown by "D1 to D5" in the diagram are information components of the channel of broadcasting, and a symbol shown by "FSC" (first code search) and "SSC" (second search code) in the Diagram is a search code. The first search code and the Second search code are transmitted at the same time.

In addition, in the W-CDMA system, the spectrum staggering is done using the codes of stepping, comprising the two stepping codes elements called step code (short code) channel specific, and randomization code (code long) specific for base stations (see figure 37 (c) and Figure 37 (d)). The same staggering code Used for pilot symbol P and information components D1 to D5, and different staging codes are used (COMMON and C + Walsh in the diagram) for the search codes. In addition, only the search code is not staggered by the code of randomization Next, the sequence of the mode is explained normal establishment of synchronization between the station base and mobile stations in the W-CDMA system keeping in mind the basic assumption (plot constitution of broadcasting channel) mentioned above.

In a W-CDMA system, the cells are basically out of sync, that is, the timings of plot and the like do not marry. According to this, in the system W-CDMA, mobile stations can be synchronized and base stations using, for example, a procedure of initial acquisition of three stages.

In the first stage, a first code is detected Search (FSC), commonly transmitted from all stations base and continuously in time. Using this, you can set slot synchronization

In the second stage, they are detected in a way continues in sixteen slots, multiple second codes of Search (SSC), transmitted at the same timing as the first search code, and determined in its transmission sequence. As a consequence, frame synchronization can be established, and in addition, you can identify a code group number of randomization More specifically, for example, as shown in Figure 33, the second search codes are detected in Sixteen continuous slots. Then, you can carry out the frame synchronization from a cycle that includes 1 to 16 from the second search codes detected from this way. In addition, the randomization code group number is you can identify, for example, a correspondence table like the one shown in figure 39. Here, slot # on the horizontal axis represents slot numbers, and groups on The vertical axis represents the randomization code groups. In addition there are seventeen types of second search codes (1 to 17), and from a combination of sixteen slots it is possible uniformly identify the code group number of randomization, that is, the randomization code used by the base station to which the mobile station belongs. The values numeric of the second search codes stored in this Table are a specific example to explain the present invention, and in the sense of identifying a given numerical pattern, by of course other numerical values can be used.

In the third stage, which of the multiple interleaving codes contained in group numbers interleaving are being used, to complete the establishment of synchronization of the downward flow line of the corresponding base station.

Figure 40 is a flow chart of a case when the synchronization setting sequence described previously it's really performing on the station side mobile. The operation of the station is explained below. mobile based on figure 37.

First, the mobile station performs the processed corresponding to the first stage, detecting the first search code (step S921). The detection is carried out continuously until a first search code is detected (step S922).

When the first code has been detected search (YES in step S922), the mobile station synchronizes the slots, and then detects sixteen second search codes in the second stage (step S923). Here, at the mobile station, when a second search code cannot be detected due to the condition of the channels or the like (NOT in step 924), it is counted the number of places not detected (step S925), and it is determined whether there are more or less of these than a predetermined number set by advanced (step S926). For example, when there are more of them, it detects the second search code again (step S923), and by another part, when there are fewer of them, only that part is detected (step S927 and step 928).

In this way, when all the second codes have been detected (YES in step S924, and YES in the Step 928), as explained above, the mobile station set frame synchronization, and identify the number of randomization code group.

Finally, as in the third stage, the station mobile identifies the randomization code used by the station corresponding base (step 931, YES in step 932), completing the Establishment of initial synchronization. In this way, the Communication is possible. When the correlation value is calculated of the randomization codes identified (step S933), when All codes are below a default value of reference (YES in step 934), the second codes are detected search again (step S923); in any other case (NOT in step S934), the randomization codes are reidentified until step 931 is completed.

On the other hand, as explained before (in a case that requires a transfer as explained in the technology conventional), when transferring between different frequencies, the power of other carriers is measured according to an order from the base station or a determination carried out by the station mobile, and if there is a carrier that seems really capable of a frequency transfer, the transfer is carried out according to a default sequence At that point, a first can be detected faultless search code, that is, at least once in the unoccupied period described in the previous embodiments of 1 at 9. However, to detect a second search code is it is necessary to look for a plot, that is the sixteen slots, and for consequently it could not be detected in this way. Therefore of similarly, it is not possible to detect the code group number of randomization.

According to this, an object of the present realization is to realize a communication device capable of detect all second search codes by scrolling gradually the unoccupied period in no more than half of a plot.

Figure 41 shows a constitution of a receiver according to a tenth example of the present invention. This constitution is provided to mobile stations.

As shown in Figure 41, the 2E receiver comprises a controller 21E, a correction decoder of errors 22, a deinterleaver 23, a dethreading unit / de-stepping 24E, a radio frequency transmitter 25, a time / scaling unit 51, a detection unit / unit 52 determination, and a switch 53. The parts of the constitution that are the same as in the examples already described they are represented by the same reference codes and omitted The explanation of them.

Through negotiations with a transmitter not shown in the diagram, the 21E controller mainly controls the operations of the deinterleaver 23 of the unit 24E deframe / de-scaling and switch 53. By Negotiations with the transmitter, this 21E controller indicates the frame numbers of the frames to be uninterleaved, appropriate for normal mode and compressed mode. Also, in the compressed mode, this 21E controller provides an instruction for reduce the staggering factor, and the timing of reception to receive the frames in compressed mode, for the switch 53, the de-frame / scaling unit 2E, and the time / scaling unit 51. That is, the switch 53 and the time / scaling unit 51 are connected only in the unoccupied period.

Radio frequency receiver 25 decodes the received signals sent from an antenna not shown on the diagram. The 24E De-Frame / De-Scaling Unit Step off using the staging codes assigned to the 2E receiver users in correspondence with the normal mode and the compressed mode, and forms a frame for each mode. When he 21E controller has ordered the unpacking unit / 24E de-stepping of reception timings in correspondence with each of the modes, the unraveling unit / 24E scaling extracts signals received from the receiver of radio frequency 25 according to the reception timings. In addition, in the compressed mode, the de-framing unit / 24E scaling receives an instruction from the 21E controller to reduce the staggering factor, and according to that instruction, get a received signal that uses a factor of lower staggering than in normal mode. The deintercalator 23 chronologically interleaves (uninterleaded) the data encoded in bit units, in reverse sequence to the interleaved in the transmitter. The error correction decoder 22 corrects errors in the uninterleaved signal to obtain the data decoded, that is, a stream of received data.

In addition, during the unoccupied period, the unit Time / Scaling 51 detects the first codes of search and the second search codes in other carriers. The detection / determination unit 52 carries out a process of determination, described below, based on the first codes search detected and in the second search codes detected.

The 2E receiver having the constitution as the shown in figure 42, receives a compressed weft over a carrier (frequency: f1) that is being used in the communication. In the unoccupied period, this 2E receiver receives the search code in another carrier (frequency: f2).

Next, the operation in the 2E receiver when a handover is made. Figure 43 is a flowchart of procedures to establish the synchronization performed on the side of the mobile station during a transfer between different W-CDMA frequencies / W-CDMA In the transfer explained below, the 21E controller performs the control based on a determination of the detection / determination unit 52.

For example, in the case of a transfer made according to an order from the base station or a determination of the mobile station, the mobile station the cell information of other carrier frequencies of the base station (step S941).

Then, based on the information extracted, the mobile station carries out a processing corresponding to the first stage detecting a first code of search and a carrier of different frequency during the period unoccupied in compressed mode (step S942). Basically, this detection is performed continuously until the first is detected search code (step S943), but redetect the cell information and the first search code according to a receiver configuration (step S944). During the period unoccupied, switch 53 is connected to the timing unit / scaling 51 conforming to controller 21E.

When the first code has been detected search and carrier of different frequency (YES in step S943), the mobile station establishes slot synchronization, and then it detects sixteen second search codes in the second stage (step S945). As the detection of the second code of search, as for example in the case shown in figure 44, the 21E controller shifts the unoccupied period for each slot, and detects a second search code in each frame. This is all the second search codes are detected in sixteen frames

In addition, the second detection procedure Search code is not limited to this, and two can be detected second search codes in a frame, as in the case shown in figure 45. This case differs from the case in figure 44 in which all second search codes can be detected in Eight frames In addition, when they are being monitored continuously multiple frames (two frames are shown in the diagram), as for the case shown in figure 46 and in figure 47, all second search codes can be detected by setting the period not busy. As explained above, the period unoccupied only needs to be set to a maximum of half of the duration of a plot, there may be many conceivable variations different from the previous ones. Therefore, the number of frames detected varies according to the length of the period not busy.

In addition, detection reliability can be improved by detecting all second search codes a number of times.

However, when the period is fixed long unoccupied, although the detection time does not last much longer that when the unoccupied period is short, there may be some deterioration in the quality of the information data that is being transmitting, or it can increase the interference power if the transmission power increases to maintain the quality of these data. On the other hand, when the unoccupied period is shortened, although there is not so much deterioration in the data quality of information compared to when the unoccupied period is long, The detection time is much longer. According to this, it you must set an optimal unoccupied period on the receiver side, taking into account the operation of the synthesizer (time  Synthesizer switching and the like) and channel status and the like In addition, the parts in the frames of Figure 45 to the Figure 47 where the grooves overlap, should be fixed as required appropriate according to the operation of the synthesizer (time of switching of the synthesizer and the like).

In Step S945, when the mobile station is unable to detect a second search code due to status of the channel (NOT in step S924), the number of places not counted detected (step S925), and it is determined whether there is more or less than one default number (step S926); for example, when there is more, it they detect the second search codes again, on the other hand, when there is less, detection is carried out in that part only.

In this way, when all have been detected the second search codes (YES in step S924, or YES in the step 928), the mobile station sets frame synchronization to the other carrier, and identifies the code group number of randomization of the corresponding base station.

Finally, as in the third phase, the station mobile identifies the randomization code used by the station corresponding base (step 931, YES in step 932), completing the establishment of the initial synchronization in the transfer. This Way is possible communication. When calculating the value of the correlation of the randomization codes identified (step S933), when all codes are below a value of default reference (YES in step 934), the second codes Search are detected again (step S923); otherwise (NOT in step S934), the randomization codes are reidentified until step 931 is completed.

Next, it is explained using the diagrams a transfer operation with another known communication system as GSM (Global System for Mobile Communications). This transfer It is also performed on the 2E receiver shown in Figure 41. By therefore, in this case, instead of the first search codes and the second search codes, the unit of time / Offset 51 detects the FCCH and SCH explained to continuation.

Figure 48 is a diagram showing a constitution of a GSM superframe. Figure 48 (a) is a channel of GSM control, that is, a channel that displays information from control such as a frequency correction channel (FCCH) for tune the frequencies, a synchronization channel (SCH) to Synchronize as well as other information. Figure 48 (b) shows a GSM traffic channel (TCH). In addition, Figure 49 is a diagram of flow in a case where a mobile station establishes the synchronization in a transfer between W-CDMA and GSM

First, as a first stage, the station W-CDMA mobile must find out where the frequency is GSM carrier, and so repeatedly measure approximately power until you find the carrier (step S951 and step S952).

Then when the mobile station has finished the power measurement, as a second stage, based to the measurement result, precisely adjust the frequency of carrier, measured by capturing the FCCH, and finely identifies the GSM carrier (step S953). In GSM, a superframe comprises Fifty-one frames, including five FCCH. Therefore, the W-CDMA system mobile station tunes the frequency in these five periods (step S954 and step S955). Further, The FCCH can be detected without changing the unoccupied period, using the fixed time difference between synchronization of FCCH / SCH superframe and superframe synchronization in the system W-CDMA However, FCCH can be detected gradually displacing the unoccupied period of it so that in the aforementioned transfer between W-CDMA systems.

Finally, when the GSM carrier has identified, as a third stage, the mobile station captures the SCH which is the frame following the FCCH and synchronizes the bit timings (step S956, step S957, and step S958). By For example, if FCCH detection is complete, the SCH position It is already known (it is the next plot) and so it can be detected easily. Therefore, although it is necessary to identify all superframes to detect FCCH, SCH can be detected simply by setting the unoccupied period so that you can detect the frame following the FCCH. However, when detected the SCH, there is no need to capture the SCH immediately after of the captured FCCH; for example, you can capture the SCH immediately after the next FCCH, or it can be captured any SCH. As a consequence, the mobile station of the system W-CDMA completes the establishment of the initial synchronization in the handover, while allowing the Carry out communication with the GSM.

In this way, in accordance with this invention, a transfer can easily be achieved between different frequencies (between a W-CDMA system and a W-CDMA system, and between a system W-CDMA and a GSM system).

The above embodiments 1 to 10 describe in detail the staging communications device of the spectrum of the present invention, and the performances of these examples share the process of using an interleaver to interpose chronologically in coded data of units of bit, and after this, use a framing unit / staggering to compress interleaved data. But nevertheless, data interleaving does not necessarily have to be performed before compression, and can be done basically in any point. For example, interleaving can be done after The data has been compressed. Therefore, when you have interleaved after the data has been compressed, the error correction encoder has the function of compressing the data, and there is no need to provide a network unit / staggering. In that case, the constitution naturally changes on the receiver side. That is, the deinterleaving process is done the first one.

Industrial applicability

As before, the communications device by spectrum staggering according to the present invention is useful for a multiple access communications system by code division (CDMA), and is especially applicable to the communication by spectrum staging carrying out the interleaving transmission and power control of transmission, and also, is applicable as a device of communication to carry out a transfer between frequencies different (between a W-CDMA system and a system W-CDMA, and between a W-CDMA system and a GSM system).

Claims (6)

1. A spectrum staging communications procedure applied to a code division multiple access system that transmits uncompressed and compressed frames, in which the compressed frame has a transmission gap characterized by select one of a first step size of transmission power control for a normal mode and a second step size of transmission power control for a compressed mode, being the second size of control step of the transmission power greater than the first step size of transmission power control; by adjusting the transmission power with the size of the transmission power control step selected based on the power control information of transmission received from a communication collateral; Y the transmission of uncompressed frames and of Compressed frames according to the transmission power adjusted 2. The procedure according to the claim 1, further comprising: receiving control information from the transmission power indicating an increase or decrease in the power. 3. A spectrum staging communications apparatus applied to a multiple access system by code division by transmitting an uncompressed frame and a compressed frame, in which the compressed frame has a transmission gap, characterized by a receiver (25) to receive information from transmission power control indicating an increase or a decrease in the potency of a collateral apparatus of the communication; a controller (11D) to select one of a first step size of transmission power control for normal mode and a second step size control the transmission power for a compressed mode, the second being Step size of transmission power control greater than The first step size of transmission power control and to adjust the transmission power with the step size of transmission power control based on said transmission power control information; Y a transmitter (15) to transmit frames not compressed and compressed frames with transmission power adjusted, the transmission power adjusted by switching between uncompressed frames and compressed frames. 4. The communications device by stepping of the spectrum according to claim 3, in which power control step sizes include step sizes of 1dB and 3dB. 5. The communications device by spectrum staging according to claim 4, further comprising a memory unit for storing the Power control step sizes for both mode normal as for compressed mode. 6. A multiple access system by division of code that transmits an uncompressed frame and a compressed frame, in which the compressed frame has a transmission gap, comprising: a mobile station that transmits the information of transmission power control indicating an increase or a power reduction; Y a base station comprising a receiver (25) for receiving control information of the transmitted power transmitted from said mobile station, characterized by a controller (11D) to select one of a first step size of transmission power control for a normal mode and a second step size control the transmission power for a compressed mode, the second being Step size of transmission power control greater than The first step size of transmission power control and to adjust the transmission power with the step size of control of the transmission power selected based on the transmission power control information; Y a transmitter (15) to transmit the frame no compressed and compressed weft with transmission power adjusted, with the transmission power changing between the frame Uncompressed and compressed weft.